It was ok. A decent enough continuation of the story.This book is much more obviously YA than the first. I am now vested into the characters (even if they are kinda irritating teenagers!) and intend to read on. I need/want to know what happens next in their story. I do like the changing environment of the ruin and the changing "zombie virus". Nobody still knows what caused it, there are lots of theories tossed around in the book. I want to see what direction that takes in the story. I just wish it had been written with a bit older audience in mind, I think the YA crowd is a smart bunch and can read at a....higher level ( for lack of a better word). Bring on the third book!